Mortuary, Bolas's Citadel, Dross Harvester, and Carrion Feeder

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Dross Harvester on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing it
2. When Carrion Feeder dies, Mortuary and Dross Harvester trigger
3. Resolve the Mortuary trigger, putting Carrion Feeder from your graveyard onto the top of your library
4. Resolve the Dross Harvester trigger, causing you to gain 2 life Resolve the Carrion Feeder ability
5. Cast Carrion Feeder from the top of your library by paying 1 life
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite storm count
• Infinite lifegain